<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息" type="info"
      center show-icon :closable="false"></el-alert>
      <el-steps  :active="activeIndex-0" finish-status="success"
      align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form :model="addForm" :rules="addFormRules"
      ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex"
        :before-leave="beforeLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称:" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格:" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量:" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量:" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类:" prop="goods_cat">
                <el-cascader  :options="cateList"
                v-model="addForm.goods_cat" :props="cateProps"
                @change="handleChange" clearable
                >
                </el-cascader>
              </el-form-item>
            </el-tab-pane>

            <el-tab-pane label="商品参数" name="1">
              <el-form-item :label="item.attr_name" v-for="item in manyTableData"
              :key="item.attr_id">
                <el-checkbox-group v-model="item.attr_vals">
                    <el-checkbox :label="cb" border
                    v-for="(cb,i) in item.attr_vals"
                    :key="i"></el-checkbox>
                  </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name+'：'"
              v-for="item in onlyTableData"
               :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload
                :action="uploadURL" :headers="headerObj"
                :on-preview="handlePreview"
                :on-remove="handleRemove"
                :on-success="handleSuccess"
                list-type="picture">
                <el-button size="small" type="primary">点击上传</el-button>
              </el-upload>
            </el-tab-pane>

            <el-tab-pane label="商品内容" name="4">
              <quill-editor
                  v-model="addForm.goods_introduce"
                />
                <el-button type="primary" class="btnAdd"
                @click="add">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
      </el-form>
    </el-card>

    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [{
          required: true, message: '请输入是商品名称', trigger: 'blur'
        }],
        goods_price: [{
          required: true, message: '请输入是商品价格', trigger: 'blur'
        }],
        goods_weight: [{
          required: true, message: '请输入是商品重量', trigger: 'blur'
        }],
        goods_number: [{
          required: true, message: '请输入是商品数量', trigger: 'blur'
        }],
        goods_cat: [{
          required: true, message: '请输入是商品分类', trigger: 'blur'
        }]
      },
      cateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover',
        checkStrictly: 'true'
      },
      manyTableData: [],
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } =
      await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.cateList = res.data
    },
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' &&
      this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked () {
      if (this.activeIndex === '1') {
        const { data: res } =
        await this.$http.get(`categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
          item.inputVisible = false
          item.inputValue = ''
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } =
        await this.$http.get(`categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败！')
        }
        this.onlyTableData = res.data
      }
    },
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
    },
    handleSuccess (response) {
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return

        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(',')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        const { data: res } =
        await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
  .el-checkbox{
    margin:0 10px 0 0;
  }
  .previewImg{
    width: 100%;
  }
  .btnAdd{
    margin-top: 15px;
  }
</style>
